17,199 research outputs found
Anonymous quantum communication
We present the first protocol for the anonymous transmission of a quantum
state that is information-theoretically secure against an active adversary,
without any assumption on the number of corrupt participants. The anonymity of
the sender and receiver is perfectly preserved, and the privacy of the quantum
state is protected except with exponentially small probability. Even though a
single corrupt participant can cause the protocol to abort, the quantum state
can only be destroyed with exponentially small probability: if the protocol
succeeds, the state is transferred to the receiver and otherwise it remains in
the hands of the sender (provided the receiver is honest).Comment: 11 pages, to appear in Proceedings of ASIACRYPT, 200
Anonymous transmission in a noisy quantum network using the W state
We consider the task of anonymously transmitting a quantum message in a
network. We present a protocol that accomplishes this task using the W state
and we analyze its performance in a quantum network where some form of noise is
present. We then compare the performance of our protocol with some of the
existing protocols developed for the task of anonymous transmission. We show
that, in many regimes, our protocol tolerates more noise and achieves higher
fidelities of the transmitted quantum message than the other ones. Furthermore,
we demonstrate that our protocol tolerates one non-responsive node. We prove
the security of our protocol in a semi-active adversary scenario, meaning that
we consider an active adversary and a trusted source.Comment: 9 + 12 pages, 9 figure
Quantum Anonymous Transmissions
We consider the problem of hiding sender and receiver of classical and
quantum bits (qubits), even if all physical transmissions can be monitored. We
present a quantum protocol for sending and receiving classical bits
anonymously, which is completely traceless: it successfully prevents later
reconstruction of the sender. We show that this is not possible classically. It
appears that entangled quantum states are uniquely suited for traceless
anonymous transmissions. We then extend this protocol to send and receive
qubits anonymously. In the process we introduce a new primitive called
anonymous entanglement, which may be useful in other contexts as well.Comment: 18 pages, LaTeX. Substantially updated version. To appear at
ASIACRYPT '0
Anonymity for practical quantum networks
Quantum communication networks have the potential to revolutionise
information and communication technologies. Here we are interested in a
fundamental property and formidable challenge for any communication network,
that of guaranteeing the anonymity of a sender and a receiver when a message is
transmitted through the network, even in the presence of malicious parties. We
provide the first practical protocol for anonymous communication in realistic
quantum networks.Comment: 5 pages, published versio
QuNetSim: A Software Framework for Quantum Networks
As quantum internet technologies develop, the need for simulation software
and education for quantum internet rises. QuNetSim aims to fill this need.
QuNetSim is a Python software framework that can be used to simulate quantum
networks up to the network layer. The goal of QuNetSim is to make it easier to
investigate and test quantum networking protocols over various quantum network
configurations and parameters. The framework incorporates many known quantum
network protocols so that users can quickly build simulations and beginners can
easily learn to implement their own quantum networking protocols.Comment: 11 pages, 6 figure
- …